Web API Login with Cookie

public HttpWebResponse InitiliazeWebRequest()
{
string responseData =string.Empty;//string url = GetServerEndPoint();string loginInstance ="url + logincreds";HttpWebRequest request =(HttpWebRequest)WebRequest.Create(loginInstance);
request.Method="POST";
request.ContentType="application/json";
request.CookieContainer=newCookieContainer();
HttpWebResponse response =(HttpWebResponse)request.GetResponseAsync().Result;
if(response.StatusCode==HttpStatusCode.OK)
{
using(System.IO.StreamReader responseReader =newSystem.IO.StreamReader(request.GetResponse().GetResponseStream()))
{
responseData = responseReader.ReadToEnd();
}
var toke = response.Headers.Get("authToken");
JObject o =JObject.Parse(responseData);
_authToken =(string)o["response"]["authToken"].ToString();
return response;
}
return response;
}
public HttpWebResponse LogOut(string shouldI)
{
string responseData =string.Empty;
string loginInstance ="https://www.example.com/logout";
HttpWebRequest request =(HttpWebRequest)WebRequest.Create(loginInstance);
request.Method="GET";
request.ContentType="application/json";
request.Headers.Add("Cookie: authToken="+ _authToken);
HttpWebResponse response =(HttpWebResponse)request.GetResponseAsync().Result;
if(response.StatusCode==HttpStatusCode.OK)
{
using(System.IO.StreamReader responseReader =newSystem.IO.StreamReader(request.GetResponse().GetResponseStream()))
{
responseData = responseReader.ReadToEnd();
}
return response;
}
return response;
}